Steam-pump.



J. MARCH.

STEAM PUMP.

APYLIGATION FILED MAR.3, 1909.

Patented Jun@ 28, 1910.

.UNITED sTATEs "PATNT OFFICE.

JOHN' MARCH, OF DILLON, MUNTANA.

STEAM-PUMP.

To all it 'may concern:

.Be it known that I, JOHN MARCH, a citi zen of the United States,residing at Dil lon, inthe count-y of Beave'rhead and State of Montana,have invented certain new and useful Improvements in Steam-Pumps, of

`vvhic'h'the following isa specification.

My said invention consists in certain improvements 1n a compound steampump', or air compressor, whereby a very efli'cient construction issecured and. one wherein economy of power and large capacity 1nI operuation are combined, all as will be hereinafter inorefully described' andclaimed.

rReferring to the accompanying .drawings which are made a part hereof,and on which similar reference characters indicate similar. parts,Figure l is a longitudinal horizontal Section through a'steani lpump 'ofmy im proved construction, Fig. 2 a longitudinal vertical action. on thedotted line 2 2 in Fig. l, and Fig.- 3 -a detail View on an en- 'larOedscale.

. 4 the ends of Whichiare mounted in slides or Ways formed inthe sidepieces of the- 4traine' A. Slidhg head 2 is connected by connectingrods' With'a cross-head 'the ends of Whichare mounted to slide in vv ysin thel trarne A. Said cross-heads 4 an are..v rigidly connectedtogether by connect-v i ng`1"odsl 7. Said sliding crosslheads .4 and 5connected bythe rods thusconstittea 'sliding frame. s'aid cylinder Bbetween said heads and has afpiston rod 9 extending from one side thereolApiston 8 is mounted in 'out through the head l1 and is" providedWitha: cross-head 10 on its outer end. The sliding crossehegad 4. isconnected by toggle links-11 and 12 WithV4 said crossehead 10 on theouter end" of. said piston rod. The centrai pivot-213 of toggle 1lextends into a slid! ing bloclr '14 mounted in la grooved Way 15Specification of Letters Patent.

Application filed March 3, 1909. Serial No. 481,162.

extending across frame A. The central pivot 16 of toggle 12 extends intoa similar block 17 mounted inl the same groove on the opposite side ofsaid Way. A steam chest B is mounted on one side of the steam cyl linderB and a steam' chest B2 on its opposite side'.A `Steam chest B hasasteam inlet!l pipe b connected With one side thereof and a steam exhaustpipe b connected with its opposite side. Said steam vchest is dijij'idedinto a steam inlet chamber and a steam exhaust chamber. A sliding valve2O is mounted in a groove in said steam chest being formed .with ports21 and 22 adapted to register with ports 23 and 2li leading into theengine cylinder. A similar, but spring supported sliding valve 25ismounted in the steam chest B2 'ormed'withports 2,6 and 27 adapted toregister With ports 28gand 29 in said cylinder. An operating rod 30 is.connected With sliding valve 2O and an operating rod 31 'with sliding'valve 2 5. 'The 'outer ends of'said 'rods extend-through. opposite endsof across-bar 32' mounted on'isliding crossehead 4; and are providedwith adjust-- able Astrikes 33.', 34C, 3-5 and mrespeetively with whichsaid bar 32is adpid tocontact, as the sliding cross-head aproaches thelimit ot' its/movement, to shi tl said .sliding valves 20 and 25 fromthe 'position showlr in Fig. 2 to the reverse position. f

' The cylinder C is of coinron'construc'tion Patented vJune 28, 1910.1

having inletports on one side 'at each end controlled' by valves LOand41 and connected .by a branch 'pipe to va main inlet pipe c and' on theopposite side provided vWith exhaust ports controlled 'by valves 42m-1d43 connected by a branch to a .main exhaust pipe o.

A piston 44 is mounted'in said'cyl'inder and connected by a piston rod 45 .with the cross- .head 10 on the 'end of the piston rod '9.

Cylinder' C is of a' similar construction hav-. i ing an inlet port onone side vcontrolled by valves 46 and 417 connected by branch 'pipes'toan inlet pipe c2 and with.exhaustports on the opposite side controlledbyvalves 478 and 49 and connected by a branch to an eX- sai'd cylinderconnected'by a piston rod 5l with the'sliding cross-,head 4 l The'innerend ofpistonrod 9 connected to the piston 8 4is formed enlarged orsurrounded by a cylinder l of approximately one-half the diameter oftheboreocylinder B, said portion A5'j being of alengthto ex,-

.haust pipe c3. A piston 5 0, is mounted. in

z tend through the head 1 and occupy `a siii- Vtween head 1 and cientportion of the area of the chamber'beiston 8 to divide the cylinder Binto a igA pressure andA low pressure expansion chamber. l

In operation the parts bei-ng inthe positionshown in Fig. 2 and thesteam coming from the steam in let pipe b through the steam chest B andthe ports 21 in sliding valve and 25,.in cylinder B, comes into thespace between head 1' and piston S and expanding drives'aid piston andhead in opposite directions, the piston 8 operating througlitli'e pistonrod 9'to drive piston i4 in cylinder C from the positionl shown in lFig. l .toward the 4opposite end of said cylindenWhile-the movementofhead 1 through l lsi-tioiishownin Fig. l toward the oppositeV endlo'i"its cylinder andv at Ythe same time tllihi-.oinection with cross-head4,1'connect inglrods 7, dross-head 6, 'and piston rod 51 'rants'isto1i50inc linder C fromvthe pov P y slides head 2 toward theapproaching piston S'iintil lsaid head 2 and pistonlS occupysubstantiallythe same position relative to each 4 othernastio head 1 andpiston 8 as shown in Vao the drainings.' When this position isapreached. the `crossbar 32 comes in Contact.V 'with the strikesV 34and'SG on the outer ends bfvalverdsfO and 31 and shifts the valves 'A 20and Z55-to V'close ports 23 and 24 and open :the ports 28 and 29 throughthe steam `chest BiintOthechamber between the head 2 and piston .8. Saidchamber beingof a larger area the steam from the phamber between piston8 and head 1 4passesinto said chambei' and expands driving the parte inthe op- 4posite direction, thus securing a double ex Y paiision of thesteam. 1Wl'ien the head 1 and posite cylinder C is operating in a like.man-- pisti'in 8 again approach l each other the valves are afgainshifted and the live steam admitted into the -high pressure chamber4 asbefore when the first expansion takes place in the high` ressiirechamber and the spent steam is ex iaiisted from the low pressurechamber.; As vthe piston 44 is "driven in one direction it will suck inthe air, or other Hind, through the inlet yvalve behind, in thedirectionv of its motion,` and drive ont under' 4pressure the Huid in-`front, in the direction o'its motion, while vthe piston 50 inthe opnerbut in a reverse direction. The pipes c and e are, `of course,-intended-to lead to a single high pressure pipe but mayl be sepiaratcly `connected if preferred; 1V,

`Bythis arrangement an engine and pump, or compressor, is'. providedwherein the cxpaiisirje force of the 'steam is used' in both directionsand balances-the strain .and vibration while its entire force isdirected upon i the Work and no part of it is spent against thestationary immovable parts.

Having thus fully described in said invention, what I claim as new, andesire to .secure by Letters Patent, is:

1. In a steampum he combination of a frame, a steam cyliiiA er, slid'lopposite `ends of said c lin er, a sliding frame to which said hea s areconnected, a

piston between said sliding heads, pumpingcylinders adjacent `toeache'nd of said steamy cylinder containin pistons, the piston of "onebeing connecte lto the ypiston rod of the piston in the steam cylinderandthe piston of the other connected to the sliding frame with'whichsaid sliding heads are connected, and the steam controlling mechanism,sub' stantially as set forth. y

2. In a. steam pump, thecombinationof a frame, a steam cylinder, slidingheads there heads yinthe I in, a slidingvfranie mounted in the 4marining frame connected to the'sliding heads onv the steam cylinder, andthesteam. controlling mechanism, 'substantially as set forth.

inders, the valves for .controlling the inlet 3. In a steam pump, thecombination of -av frame, the steam cylinder, the pumping cyl--'andexhanst ports of'said pumping cylinders, `the sliding-.heads in saidsteam cyl inder connected to a sliding frame, said slid' ing frame, 'apiston between said sliding headspa connection between said iston andthe piston of one pumping cylin er, a coniiection between the slidingframe andv the piston ofthe other pumping cylinder, steam `inlet andexhaust orts leading into-'the steam cylinder-on tie o posits sidesofthepiston, slidingvalvesI or controllingsaid' ports, anda connectionbetween thesliding iin frame and said sliding valves for shifting theirposition, substantially as set forth.

-ln .witness whereof, I have V hereunto set my hand and seal yatWVashingt-on, '1). C;

nineteen this 26th day of February., A. D. hundred and nine.

JOHN M'acii. [as] iis

